Suggest affordable cable options

My current setup is as follows: Bowers and Wilkins CM10 s2 (speakers), Parasound A21 (amp), Cambridge Audio Azur 851D DAC/Preamp connected to the amp via balanced connectors.

I am currently using cheap Audioquest ($50) cables and have been advised by many at Agon that upgrading to better speaker wires would yield considerable results. Now, when it comes to cables I'm admittedly not so educated, so I can surely use some advise here.

I want to stay below $750 - open to both new or used. Someone at Audiogon suggested Clear Day cables which can be had for around $500 for the top option. My only concern is that B&W are already known to be a bit forward/bright, so adding silver cables, which also have a reputation to be a bit on the bright side (feel free to correct me if this assumption is just plain wrong), might not be the most prudent approach.

Unfortunately, the more I research the more I get confused. Some say that it's a waste of money, and that a wire is a wire is a wire. Others advise to stick with name brands such as Audioquest, Tara Labs, etc. While others swear by boutique but affordable options such as Clear Day cables. Usually, the reason given by this camp is that the cables are more affordable because they manufacturers don't have marketing overhead. However, I'm sure the more established companies have higher profit margins that potentially lead to bigger and better R&D.

Regardless, one thing is for sure -- I'm not in the mood to spend more than 30% of what my system is worth.